private static void RegisterKnownWorkspaceResolvers(
     DScriptWorkspaceResolverFactory workspaceFactory,
     GlobalConstants constants,
     ModuleRegistry sharedModuleRegistry,
     IFrontEndStatistics statistics,
     MsBuildFrontEnd msBuildFrontEnd,
     NinjaFrontEnd ninjaFrontEnd,
     CMakeFrontEnd cmakeFrontend)
 {
     workspaceFactory.RegisterResolver(
         KnownResolverKind.SourceResolverKind,
         () => new WorkspaceSourceModuleResolver(constants, sharedModuleRegistry, statistics, logger: null));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.DScriptResolverKind,
         () => new WorkspaceSourceModuleResolver(constants, sharedModuleRegistry, statistics, logger: null));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.DefaultSourceResolverKind,
         () => new WorkspaceDefaultSourceModuleResolver(constants, sharedModuleRegistry, statistics, logger: null));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.NugetResolverKind,
         () => new WorkspaceNugetModuleResolver(constants, sharedModuleRegistry, statistics));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.DownloadResolverKind,
         () => new DownloadWorkspaceResolver(constants, sharedModuleRegistry));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.MsBuildResolverKind,
         () => new MsBuildWorkspaceResolver(constants, sharedModuleRegistry, statistics, msBuildFrontEnd));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.NinjaResolverKind,
         () => new NinjaWorkspaceResolver(constants, sharedModuleRegistry, statistics, ninjaFrontEnd));
     workspaceFactory.RegisterResolver(
         KnownResolverKind.CMakeResolverKind,
         () => new CMakeWorkspaceResolver(constants, sharedModuleRegistry, statistics, cmakeFrontend, ninjaFrontEnd));
 }
        private static IFrontEndController TryCreateFrontEndController(
            FrontEndFactory frontEndFactory,
            IDecorator <EvaluationResult> decorator,
            ICommandLineConfiguration configuration,
            SymbolTable symbolTable,
            LoggingContext loggingContext,
            PerformanceCollector collector,
            bool collectMemoryAsSoonAsPossible,
            IFrontEndStatistics statistics)
        {
            var workspaceResolverFactory = new DScriptWorkspaceResolverFactory();

            Contract.Requires(frontEndFactory != null && !frontEndFactory.IsSealed);

            // Statistic should be global for all front-ends, not per an instance.
            var frontEndStatistics = statistics ?? new FrontEndStatistics();

            var globalConstants      = new GlobalConstants(symbolTable);
            var sharedModuleRegistry = new ModuleRegistry();

            // Note, that the following code is absolutely critical for detecting that front-end related objects
            // are freed successfully after evaluation.
            // ModuleRegistry was picked intentionally because it holds vast amount of front-end data.
            FrontEndControllerMemoryObserver.CaptureFrontEndReference(sharedModuleRegistry);

            frontEndFactory.SetConfigurationProcessor(
                new ConfigurationProcessor(globalConstants, sharedModuleRegistry, logger: null));

            var msBuildFrontEnd = new MsBuildFrontEnd(
                globalConstants,
                sharedModuleRegistry,
                frontEndStatistics);

            var ninjaFrontEnd = new NinjaFrontEnd(
                globalConstants,
                sharedModuleRegistry,
                frontEndStatistics);

            var cmakeFrontEnd = new CMakeFrontEnd(
                globalConstants,
                sharedModuleRegistry,
                frontEndStatistics);

            // TODO: Workspace resolvers and frontends are registered in separate factories. Consider
            // adding a main coordinator/registry
            RegisterKnownWorkspaceResolvers(
                workspaceResolverFactory,
                globalConstants,
                sharedModuleRegistry,
                frontEndStatistics,
                msBuildFrontEnd,
                ninjaFrontEnd,
                cmakeFrontEnd);

            frontEndFactory.AddFrontEnd(new DScriptFrontEnd(
                                            globalConstants,
                                            sharedModuleRegistry,
                                            frontEndStatistics,
                                            evaluationDecorator: decorator));

            frontEndFactory.AddFrontEnd(new NugetFrontEnd(
                                            globalConstants,
                                            sharedModuleRegistry,
                                            frontEndStatistics,
                                            evaluationDecorator: decorator));

            frontEndFactory.AddFrontEnd(new DownloadFrontEnd(
                                            globalConstants,
                                            sharedModuleRegistry));

            frontEndFactory.AddFrontEnd(msBuildFrontEnd);
            frontEndFactory.AddFrontEnd(ninjaFrontEnd);
            frontEndFactory.AddFrontEnd(cmakeFrontEnd);

            if (!frontEndFactory.TrySeal(loggingContext))
            {
                return(null);
            }

            return(new FrontEndHostController(frontEndFactory, workspaceResolverFactory,
                                              frontEndStatistics: frontEndStatistics, collector: collector, collectMemoryAsSoonAsPossible: collectMemoryAsSoonAsPossible));
        }